Self-adjusting pipe and bolt wrench



Aug, 11', 1925.

J. P. ALBERTlNE SELF ADJUSTING PIPE AND BOLT WRENCH Eiled M5. 24, 1923 II/T/VESSE? JO/M' I? AZ 85577 E wzfw Patented Aug. 11, 1925.

sra'r JOHN P. ALBERTiNE, or ROGKVALE, COLORADO.

SELF-ADJUSTING PIPE AND BOLT WRENCH.

Application filed February 24., 1923. Serial No. 620,979.

To all whom it may concern.

Be it known that I, J oI-IN P. ALBERTINE, a citizen of the United States, residing at Rockvale, in the county of Fremont and State of Colorado, have invented certain new and useful Improvements in a Self- Adjusting Pipe and Bolt l/Vrench, of which the following is a specification.

This invention relates to pipe, bolt and nut wrenches and the primary object of the invention is to provide a wrench which will automatically adjust itself to the size of the work, without necessitating the use of adjusting screws, and the like.

Another object of the invention is to pro vide an improved Wrench which will firmly and tightly grip the work and effectively prevent the slipping of the work in the jaws of the wrench.

A further object of the invention is to provide a wrench of the above character embodying an operating handle, having novel means for moving the movable jaw of the wrench into intimate contact with the work during the moving the operating handle.

A still further object of the invention is to provide an improved self-adjusting wrench of the above character which will be durable and efficient in use, one which will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

With these and other objects in View the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a side elevation of the improved wrench, showing parts thereof broken away.

Figure 2 is a rear elevation of the wrench, showing the shank of the movable jaw in transverse section.

Referring to the drawing in detail, where'- in similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates the improved wrench, which includes an operating handle 5. This operating handle 5 is preferably formed of steel, but it is to be understood that other suitable material can be used. At the inner end of the handle is an angular extension 6 provided with a substantially fiat circular head 7 which is provided with teeth 8 on its periphery, the purpose of which will be hereinafter more fully described. The head 7 is reduced in width, as canbe clearly seen by referring to Figure 2 of the drawing. The axial center of the head 7 is provided with an enlarged opening 9, the walls of which support the pivot pin 10, on which is rockably mounted the frame B.

The frame B includes the side plates 15 and 16 disposed in spaced parallel relation and the bridge rear wall 17. The outer end of the bridging wall 17 is provided with a reinforcing extension 18, the purpose of which, will be hereinafter more fully described. The outer edges of the side walls 15 and 16 support a rigid jaw face 19. A sliding jaw 20 is provided and this sliding jaw is provided with a serrated working face, as is the jaw face 19, for permitting the use of the wrench on round as well as polygonal work. The movable jaw face 20 is provided with an inwardly extending shank 21 having rack teeth 22 formed on its inner edge, which are adapted to mesh with the teeth 8 formed on the wheel or disk 7 This shank 21 is extended between the plates 15 and 16 and engages with the bridging wall 17 V In the operation of the improved wrench, the handle 5 is first moved in a clock-wise direction, which will move the movable aw 20 away from the stationary jaw face 19. The wrench is now placed on the work and the handle is moved in a counter-clockwise direction, which will of course effectively move the jaw 20 into engagement with the work, and it is obvious that the more the force is applied to the handle, the more the grip will be obtained on the work. The reinforcing section 18 acts as a guide for the movable jaw 20 and serves as reinforcing member therefor and also serves as a support therefor.

Changes in details may be made without departing from the spirit or scope of this invention.

hat I claim as new is:

A wrench comprising an elongated operating handle having an offset extension formed on the inner end thereof, a flat circular head formed on the free end of the extension having teeth formed on the periphery thereof extending from one side of the extension to the other, a rocking frame receiving said head including a pair of spaced parallel side plates and a connecting bridge wall, a pivot pin extending through the side plates and through the axial center of said head, a. shank slidably mounted in said frame between said side plates and in facial abutment therewith, a jaw formed on the outer end of the shank, a aw formed on the outer end of the frame facing the first mentioned jaw, rack teeth formed on the inner edge of the shank meshing with the teeth formed on the head, and an extension formed on the outer end of the connecting bridge wall extending beyond the jaw carried by the frame disposed in spaced parallel relation to the shank for forming a reinforcement for the shank and the jaw carried thereby, said extension overlying the jaw carried by the shank when the jaws are in their closed position.

In testimony whereof I aflix my signature 20 in presence of two witnesses.

JOHN P. ALBERTINE.

Witnesses LoUIs MILLER, CHAS. KILE. 

